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WorksheetsPrinciples of Technology 2 Unit 8 Test
Total questions: 7
Worksheet time: 19mins
The law of conservation of momentum tells us that in an isolated system _________________________.
the total momentum before an interaction equal!s the total momentum after the interaction
the velocity before an interaction equals the velocity after the interaction
the kinetic energy before an interaction equals the kinetic energy after the interaction
the total momentum before an interaction is greater than the total momentum after the interaction
An object's momentum tells us mostly about ___________________.
the potential energy the object has
the amount of motion the object has
the physical size of the object
the specific gravity of the object
Lmom=
Iω
mI
m + i
mr2
Which of the following will give you the full and correct information about a rotating object's angular momentum?
mass and angular velocity
moment of inertia and angular velocity
mass and radius
linear momentum and specific gravity
When balancing an automobile wheel that is mounted on the automobile, a 30-lb tangential force is applied to the tread of the tire for 15 seconds. The tire and wheel have a radius of 1.5 feet. The angular impulse of the wheel is ______________. (Hint: Use the equation, Ang Imp = TΔt where T = F x r to complete the sentence.
3 (lb·ft)·sec
300 (lb·ft)·sec
450 (lb·ft)·sec
675 (lb·ft)·sec
A steam turbine has blades of 0.6-m radius. Steam strikes the turbine blade tips with a force of 1600 N. If the steam is directed onto the turbine blade tips for 60 seconds, what is the angular impulse given to the turbine?
16 (N·m)·sec
Good Luck!
960 (N·m)·sec
159,960 (N-m)·sec
A constant force of 1500-lb brings a truck to a stop in 30 seconds on a straight road. The truck experiences a change in velocity of 80 ft/sec during the time the force is applied. Find the mass of the truck. (Hint: Use the relationship FΔt = mΔv .)
562.5 kg
562.5 slugs
3,600,000 kg
3,600,000 slugs
